Controller.



No. 776,895. PATENTED DEC. 6, 1904. J. P. DURKIN.

CONTROLLER.

APPLICATION FILED 000315, 1904.

a. SHEETS-SHEET 1 WITNESSES: INVENTUH I 11 3 BY ifl lm gm/L vy ATTORNEY.

PATENTED DEC 6, 1904.

J. P. DURKIN.

UONTRQLLER. APPLICATION FILED 0OT.15,1904.

2 SHEETS-BREEZE 2.

N0 MODEL.

WITNESSES B m 21. M

A TTORI IEV.

' UNITED STATES Patented December 6, 1904.

PATENT OEEicE.

JOHN P. DURKIN, OF PIllLAIDELPll lA, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO GEORGE B. KIRKBRIDE, \NlLLlAM S. TITAYLOR, AND EDGAR W. BAIRD, OFPHILADELPTHA, PENNSYLVANIA.

CONTFiOLLEFi.

SPECIFICATION forming part of Letters Patent No. 776,895, dated December6, 1904;. Application filed October 15, 1904:. Serial No. 228,609- (Nomodel- To all wit/mt it Uta/y concern.-

Be it known that I, J OIIN P, DURKIN, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain Improvements in Controllers, 01"which the following is a specification.

This invention relates to improvements in controllers, particularly forelectric car-motors, and its leading object is to provide a simplifieddevice for automatically effecting a graduated turning on of thecurrent, preventing it from being thrown on too rapidly, whilepermitting a reversal or throw-ofi' without retardation.

In the accompanying drawings, Figure 1 represents a plan view of acontroller to which my improvements are applied. Fig. 2 represents anelevation of the same, part of the handle being shown in section. Fig. 3represents a sectional view taken on the line 3 3 of Fig. 2. Fig. 4represents an elevation having part of the handle shown in section inillustration of a modified construction, and Fig. 5 represents anelevation having part of the handle broken away in illustration of a:further modified construction.

As shown in the drawings, the controllercasing 1 supports the ring 2,having thereon the stops 3 and the rack or serrated ring a, the lattercomprising the teeth 5, having faces 6, inclined to the normal, and 7substantially radial to the ring. The shaft 8 for operating thecommutator is engaged and revolved by the handle 9, having in theaperture 10 thereof a bolt 11, carried in bearings 12 and 13 of thehandle. A catch 14 is carried by the bolt and is pressed inward by thespring 15, located between the bearing 13 and the washer 16, makingcontact with the catch, the latter being adapted to reciprocate radiallyto its path of revolution, to oscillate in the lateral opening 17 of thehandle, and to be limited in its oscillatory movement by the handlesdepending portion 18.

As shown in Fig. 2, the bolt 11 may be fixed as by a set-screw 19. Thecatch 14 reciprocates and oscillates on the bolt, the catch being heldnormally against the adjacent inclined surface 6 by the spring 15.

As shown in Fig. 1, the bolt 11 is adapted to reciprocate in itsbearings 12 and 13, but is held against revolution by the pin 20, set inthe handle and passing through the slot 21 in the bolt. The catch 14 isadapted to oscillate on the bolt while its outward reciprocation thereonis limited by fixing the Washer 16 to the bolt, the latter being pressedinward by the spring to hold the catch in its normal position againstthe adjacent inclined sur face 6.

As shown in Fig. 5, the catch 14 may be fixed, as by the pin 20, to thebolt 11, which is adapted. to reciprocate and oscillate in its bearings12 and 13, the spring 15 pressing the bolt and the catch fixed thereoninward to hold the catch in its normal position in contact with therack.

In operation as the handle is revolved in the forward direction to throwon the current the catch will be thrown out by the inclined surface,against which it bears,together with the momentum of revolution, intoengagement with the stop in its path, by which the revolution ischecked. Upon relieving the pressure on the handle the spring throws thecatch inward again, permitting the handle to be advanced again, theoperation continnlng in the same way. Whcn1t is desired to reverse andthrow oil the current, this can be accomplished without retardation, asthe catch is free to rock so as to ride over the rack.

Having described my invention, I claim- 1. A controller having a handle,a catch connected with said handle, an inclined surface, a spring forcausing said catch to engage with said. surface, and a stop againstwhich said catch is thrown by said surface and the move ment of saidhandle, said spring disengaging said catch from said stop, substantiallyas specified.

2. A controller having a handle, a bolt carried by said handle, anoscillating catch connectcd with said bolt, a serrated rack, means forautomaticallythrowingsaid catch into position to engage said rack, and aseries of stops into the path of which said catch is thrown by said rackand the movement of said handle, substantially as specified.

3. A controller having a handle, a bolt carried by said handle, a catchhaving amovable connection with said bolt, a serrated rack, means forautomatically throwing said catch into position to engage said rack, anda series of stops into the path of which said catch is thrown by saidrack and the movement of said handle, substantially as specified.

4. A controller having a handle, a bolt connected with said handle,areciprocating catch adapted to oscillate on said bolt, a serrated rack,automatic mechanism for causing said catch to occupy a position to beengaged by said rack, and a series of stops against which said rackthrows said catch successively, substantially as specified.

5. A controller having a handle, a bolt adapted to reciprocate in saidhandle, a catch adapted to oscillate on said bolt, an inclined surface,automatic mechanism for causing said catch to engage said inclinedsurface, and a stop against which said catch is thrown by said inclinedsurface and the revolution of said handle, substantially as specified.

In testimony whereof I have hereunto set my hand, this 1st day ofOctober, 1904, in the presence of the subscribing witnesses.

JOHN P. DURKIN.

Witnesses:

CHARLES N. BUTLER, UTLEY E. CRANE, Jr.

[SEAL] It is hereby certified that Letters Patent No. 776,895, grantedDecember 6, 1904, upon the application of John P. Durkin, ofPhiladelphia, Pennsylvania, for an improvement in Controllers, waserroneously issued to the inventor, John P. Durkin, and George B.Kirkbride, William S. Taylor, and Edgar W. Baird, as assignees ofonehalf interest in said invention; whereas the said Letters Patentshould have been granted to said George B. Kirk-bride, William S.Taylor, and Edgar W. Baird, they being sole owners of the entireinterest as shown by the assignments of record in the Patent 0m alsothat the Words one-half in line 7 of the grant, and the words of onehalfin the heading to the printed specification should be stricken out; andthat the said Letters Patent should be read with these correctionstherein that the same may conform to the record of the case in thePatent Office.

Signed and sealed this 20th day of December, A. 1)., 1904.

F. 1. ALLEN,

Commissioner of Patents.

